cray-447 inc. has two segments: the north segment and the south segment. the north segment has sales of $265,000, variable expenses of $141,600, and traceable fixed expenses of $66,800. the south segment has sales of $575,000, variable expenses of $321,800, and traceable fixed expenses of $126,300. the company's common fixed expenses total $126,200. what is the company's net operating income?